Friction draft-gear for railroad-cars.



w. H. Mmm. FRICTION DRAFT GEAR FOR RAILROAD CARS. APPLICATION FILEDAUG.19I916.

1,252,359. Y v Patented Jan. 1, v1918.

Flg/ a I' Z3 ww I HN IN VEN TOR.

WITNESS L A I ner ev TQBATTRNEY UNITED sTaTEs PATENT oEEIoE.

WILLIAM H.,MIN'EB, 0F CRAZY, NEW YORK.

FRICTION DRAFT-GEAR FOB B AILROAD-CARS.

To all 'whom it may concern:

Be it known that I, WILLIAM H. citizen of the United States, residinChazy, in the county of Clinton and. tate of New York, have invented acertain new and useful Improvement in Friction Draft- Gears forRailroad-Cars, of which the following is a full, clear, concise, andexact description, reference beinghad to the accompanying drawings,forming a partof this specification. i

My invention relates to improvements in friction draft gear for railroadcars.

TOne object of my invention is to provide a durable friction draft gear.A further object is to provide a friction draft gear hav- MI'NER, a

' inggajfriction shell with a removable and l'open at its front end 7and closed at its W'ithin the shell are disposed the elements 9 and thespring lelements 10. The

renewable friction face, and other objects will-appear from thedescription of the device herein following.

ln the drawings forming a part of this specification, Figure 1 is avertical longitudinal section of a. draft gear embodying my invention.Fig. 2 is an enlarged end elevation of the friction shell. Fig. 3 'is aperspective view of a locking key. Fig. 4 is an end elevation 4of amodification,

Fi 4 and taken on the line thereof.

indicates a draft gear having a shell 6, preferably of hollowcylindrical shape, and

rear end by the preferably integral late 8. riction friction elementsl 9comprise a plurality of friction shoes 11, preferably three 1u number inannular arrangement within .the shell, a. wedge or spreader member 12for said shoes, andA antifriction rollers 13 mounted between each of theshoes and an adjacentwedging face 14 ofthe wedge. The wedge is providedat its outer end with4 a. chamber 15 adapted to receive'the nut 16 whichis threaded upon the forward end of theconnecting rod 17, the connectingrod being provided at its rear end with a head 18, which is receivedwithin the recess 19 rovided in the rear plate 8 of the shell.

nested therein, thesaid springs being seated at their rear ends againstthe wall 8-of the shell and attheir forward ends against the frictionshoes.^..'1`he internal friction p01*-,

Bpecication ot Letters Patent.

:Wa pdl and Fig. ish detail section of the structure shown 1n ghe springmembers 10 preferably comprise an outer spring 2 0 and an 'inner'spring21 Patented J an. 1; .1918.

pplication Bled August 19, 1916. `Serial I o. 115,872.

. tion of the shell extends from its forward end 7 rearwardly mit theinward travel of thefriction s oes upon'compression of the gear, thisportion of the shell being rear-` provided with an internal shoulder 23an a forward shoulder 24, thus forming between the two shoulders anannular groove within the shell to receive the removable friction platesor liners 25.

In the form shown in Figs. l, 2 and 3, the liner consists of a plurality(preferably two) ofsections or shoes 26 suitably curved to engage attheir outer faces 27 against the face of the annular groove within theshell and provided along their edges with the wedge shaped portions 28,suitably spaced apart as at 29-29 to receive thecorrespond' ingly shapedand longitudinally ta ered dovetail key,30 which extends lengt wise ofthe shell and locks the said members within'the shell.. The forwardshoulder 24 is suitably discontinued at the portions 45-45 for theinsertion of the dovetail keys to permit their longitudinal passage into p osition, .as clearly shown in Fig. .2 of the drawings. i v

4In assembling the parts of the draft gear, the liner is first placed intheshcll, the sections being inserted through the forward opening of theshell i'nto their position within the annular groove, and whcrl somounted the keys 30'are driven longitudinally and wedged in position,thus locking the liner securely within the shell. If desired, differentmaterial from that of the shell may be em loyed inthe liner, and uponthe wearing of) the liner, through thefrictional action of the-shoesthereon, the same may be, when desired, easily removed and a new liner asuflicient'distance to erparts within theb inserted'. As illustrated -inFig. 1 of the drawings1 the liner has a constant internal diameter fromend to end, but the external diameter at its forward end 31 is greaterthan its external diameterat its rearw-'ard end. 32, thus forming alinerthat upon its outer surface is tapered rearwardly to permit the easyinsertion of the liner and insure a" lit of the liner within the shell.

Iii/the modification shown in Figs. 4 and 5, the friction shell 'is'provided. with a shoulder 123 approximately a* the inner edge of thefriction surface and also with an under-cut'recess or-groove 122 at itsouter edge. These shoulders coperat'e withthe inner edge 124 of acontinuous liner 130 and shell, friction elements within. the shell, a

an annular flange 125 at its outer edge, respectively. The liner 130 hasits exterior surface tapered and the opposed surface of the frictioncylinder is similarly tapered. In actual practice, the liner 130 isinserted within the cylinder as far as possible by hand and then isdriven home under a heavy pressure, as for instance by a hydraulic ram.In this manner, the liner is securely wedged in place and will beprevented from becoming loose in the operatlon of the gear. The interiorsurface of the liner 130 is, of course, made of true, cylindrical form.

I claim:

l. In a draft gear for railroad cars, a

l liner adapted to be engaged by the friction ienients, `the said linercomprising a'plu- .lity of sections, and wedge shaped dovetail keysengaging the edges of said sections. i

2. In a friction draft gear for railroad cars, a. shell, frictionelements including friction shoes within the shell, a liner forfrictional engagement with said shoes, the liner comprising a pluralityof sections, and longitudinally extending keys engaging the edges ofsaid sections.

3. In a .draft gear for railroad cars2 a shell, friction elementsincluding friction shoes within the shell, a removable liner forengagement with the said friction shoes,-

the said liner comprising a plurality -of sec- 'edges of said tions, theshell being provided with an annular groove to receive said sections,and longitudinally extending keys engaging the Edges of sai sections.

4. In a draft gear for railroad cars, a shell, friction elementsincluding friction shoes within the shell, a removable liner engaged bysaid friction shoes` the shell having an annular groove to receive saidliner`- the liner comprising a plurality of members, and keys engagingthe adjacent members to lock them together.

5. In a draft rigging for railroad cars, a shell, friction elementsincludingr friction shoes within the shell. a liner for said shellfrictionally engaged h v thc friction shoes, the said shell and the'outer portion of said liner heilig rearwardly tapered.

6. As an article of manufacture, a friction .sh'ell for railway draftriggings, said shell having an inner liner acting as the frictionsurface for coperation with frietion elements,'the outer surface of saidliner being tapered toward thev interior of the shell, andl the innersurface of the shell being correspondingly tapered, the liner and shellhaving coperating engaging shoulders to limit the inward movement of theliner. In witness that I claim the foregoing I have hereunto ,subscribedmy name this 16th day of Aug. 1916.

VVILLIIXM H. MINER.

